package cn.broadmax.boot.util;

import javax.servlet.http.HttpServletRequest;

/**
 * servlet工具类
 * @author jeff
 * @date 2020/6/20
 */
public class ServletUtils {

    public static String getIpAddrByRequest(HttpServletRequest request) {
        if(request == null){
            return null;
        }
        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        return ip;
    }

}
